How to pass request to middleware?

Question

Laravel

There are two middlewares
here, I want to convert some data and pass it to the next middleware, how do I send $content so that the request reaches the middleware trail?

class ConverterMiddleware
{
    public function handle($request, Closure $next)
    {
        $content = json_decode($request->getContent(), true);

        $content = $this->convertDate($content);

        return $next($content);
    }
}

Answer 1

Pass Request $request
AND in middleware either change existing parameters or add new ones like this:
$request->request->add(['variable' => 'value']);